Alex Pettyfer is set to have a romance with Kristen Stewart, but his girlfriend Riley Keough need not worry.

The Magic Mike star is rumoured to have landed the role of the Twilight actress' love interest in gritty action film Cali, reported Variety.

The pair will play lovers who sell a fake snuff film and disappear with the money, only for Kristen's character to "return from the dead" to help her younger sister in Nick Cassavetes' drama.

Kristen - who admitted she is "deeply sorry" for her affair with Snow White And The Huntsman director Rupert Sanders - is to make her debut as a producer on the project, which is scheduled to start filming in coming months.

Alex, who can be seen on screens in Steven Soderbergh's Magic Mike alongside Channing Tatum and Matthew McConaughey, will next star in Lee Daniels' The Butler with Forest Whitaker and Oprah Winfrey.